Are you sure you aren't confusing the splitter and video decoder? H265 refers to the video decoder - not the container format, which is what MKV is. If the file extension is MKV regardless of what video codec was used to encode the video stream, Haali should be able to split it - and as long as you have H265 set to LAV in the video decoder section, LAV should decode it (meaning you can use both).
Thanks for the sample. Yes, you are correct - that is interesting, I thought the splitter only looked for the file extension, and didn't care about the codec the video stream was encoded in (or even knew what it was). That obviously isn't correct. It doesn't even throw a Smart Play error, it just silent fails.
When I preview MKV, AVI, WMV or MPG files, Opus 10 starts Haali media Splitter. The problem is that the system tray displays a seperate Haali media splitter for each file that I preview. How can I get Opus to reuse the same application?
I couldn't tell you as I don't know what K-Lite or Haali install exactly. I just install FFDShow + the handful of splitters I actually need, manually without using a codec pack. Keeps things simple and means I know exactly what is installed on the machine (ignoring anything that 3rd party tools add without telling me, of course, but that seems very rare these days).